Signature nevi

Dermoscopy of black skin: A cross-sectional study of clinical and dermoscopic features of melanocytic lesions in individuals with type V/VI skin compared to those with type I/II skin

“…After this first evaluation, 1 lesion from each patient was chosen for dermoscopic assessment. Nevus selection was based on the following aspects: being representative of the patient's signature nevi 12 and displaying a predominance of a macular component with a diameter greater than 2 mm but smaller than 15 mm. A representative nevus is defined as a lesion that shows a dermoscopic typology (global pattern, pigment and color distribution) and that is repeatedly observed in the same patient in at least 40% of the lesions.…”

Early detection of melanoma: Reviewing the ABCDEs

“…57 Another simple tool is the ''ugly duckling'' sign. Introduced by Grob and Bonerandi 58 in 1998, it is based on the premise that an individual's nevi share common characteristics (ie, a ''signature nevus'' 59 ), and that melanoma often deviates from this nevus pattern. Although the ugly duckling sign may also be useful in melanoma screening, there are currently no studies comparing its performance alone, or in concert with other methods including the ABCDE criteria.…”

Halo Nevus Arising from Congenital Melanocytic Nevus Featuring an Early Onset Vitiligo

“…The majority of the halo nevus arises on acquired nevus followed by congenital melanocytic nevus, melanoma, neurofibroma, seborrheic keratosis and lichen planus. Although, no exact chronological study has been elucidated, halo nevus arising in congenital melanocytic nevus composites 4.7% of all halo nevus and is common under the age of 20 [7]. In addition, the presence of concurrent congenital melanocytic nevus was suspected to be involved with significantly higher occurrence of halo nevus, lower age onset of vitiligo and higher risk for Koebner phenomenon compared to the control group that was without congenital melanocytic nevus [4].…”